However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.
From a career standpoint, the term âbiologistâ can have many meanings. As a biologist, you might study plants, animals, people or a particular environment. You could work in marine biology, wildlife biology or biochemistry, travel to the Brazilian rain forest to study biological compounds or work in a clinical laboratory as a microbiologist.
Rating Newest Oldest. Best Answer: You can become a marine biologist or an oceanographer with just 4 years of college. What I would suggest if you are really interested in this field is to volunteer every chance you get.eport Abuse. Four years of undergrad. After that you can be a marine biologist... but you need three or four years of grad school to get your doctorate.